- Combustion
- Wind & solar
- In development
- Retired
- 10 · 100 · 1,000 MW
Map
- Combustion
- Wind & solar
- In development
- Retired
Cholla: location and 1 exact-grade project within 25 km. Basemap: Protomaps, © OpenStreetMap contributors, ODbL.
Cholla
Power plant · Coal
Key facts
Power plant · Coalran 13% of 2024 Retired- Capacity
- Capacity: sourceEIA-860M · Open licenseMW
- Commissioned
- 1962
- Net generation, 2024
- 1,320,775 MWh
- Grid
- 500 kV to Arizona Public Service Co (AZPS)
- Location
- Navajo County, Arizona
- Operated by
- Arizona Public Service Co
Output
- Gas
- Coal
- Oil
Details
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- Technology
- Coal source: “Conventional Steam Coal”
- Age
- 64 years since 1962
- Heat rate
- 12,128 Btu/kWh 2025
All 7 attributes from EIA-860M Preliminary Monthly Electric Generator Inventory
| Attribute | Value |
|---|---|
| Gem |
|
| EPA greenhouse gas reporting (GHGRP) |
|
| Fuel burned (MMBtu), 2025 | 4,751,090 |
| Capacity factor, 2025 | 0.040 |
| Heat rate (Btu/kWh), 2025 | 12,127.9 |
| Net generation (MWh), 2025 | 391,750 |
| Balancing authority code | AZPS |
Retirement
EIA-860M September 2026StatusEvery generator EIA lists at this plant has retired. As of EIA-860M for September 2026.- Retired
- March 2025
- First unit retired
- November 2015
- Capacity retired
- 1,128.8 MW
- Generators retired
- 4
| Generator | Technology | Nameplate | State | Date |
|---|---|---|---|---|
| 2 | Conventional Steam Coal | 288.9 MW | Retired | November 2015 |
| 4 | Conventional Steam Coal | 414 MW | Retired | December 2020 |
| 1 | Conventional Steam Coal | 113.6 MW | Retired | March 2025 |
| 3 | Conventional Steam Coal | 312.3 MW | Retired | March 2025 |
Grid
EIA-860 2025Grid fieldsAs the plant reported them to EIA-860 for 2025 (Schedule 2).- Grid voltage at the plant
- 500 kV
- Transmission or distribution system owner
- Arizona Public Service Co
- Balancing authority
- Arizona Public Service Company
- NERC region
- WECC
Can the connection be reused?
A plant that retires usually leaves its substation, transmission connection and interconnection agreement behind, and those may be reusable by a new project at the same site. FERC Order No. 845 lets an interconnection customer use surplus interconnection service at an existing site, and some transmission providers' tariffs let a replacement resource take over a retiring unit's interconnection service, usually within a set time after the retirement. Whether any such right still exists here, who holds it and on what terms depends on the owner, the transmission provider and timing; this page does not establish any of that.
Ownership
3 companies3| Company | Role | Share | As of | Source |
|---|---|---|---|---|
| Arizona Public Service Co | Operator | EIA-860M | ||
| PINNACLE WEST CAPITAL CORP | Owner | 100.0% | 31 Dec 2023 | EPA GHGRP |
| PacifiCorp | Owner | 100.0% | 31 Dec 2025 | EIA-860 |
Timeline
- Stated Units 1, 3 scheduled to retire, 425.9 MW · EIA-860M
- Stated Unit 4 scheduled to retire, 414 MW · EIA-860M
- Stated Unit 2 scheduled to retire, 288.9 MW · EIA-860M
- In service · EIA-860M
Sources
6 sourcesSources EIA-860M · GEM · EIA · EIA-860M Preliminary Monthly Electric Generator Inventory · EPA Greenhouse Gas Reporting Program — facility register with parent-company shares (Envirofacts pub_dim_facility; FLIGHT) · EIA-860 Annual Electric Generator Report — Schedule 4 Owner (ownership shares per generator), plus Plant/Generator schedules
Sources
- EIA-860M Preliminary Monthly Electric Generator Inventory
- Global Energy Monitor — Global Integrated Power Tracker (unit-level power plants, eight technologies, all statuses)Global Integrated Power Tracker, Global Energy Monitor, September 2026 release (https://globalenergymonitor.org/projects/global-integrated-power-tracker), CC BY 4.0. Modified by Inframation: TransitionZero-sourced rows removed; statuses and technologies mapped to Inframation's vocabulary; figures aggregated. Copyright © Global Energy Monitor. Global Integrated Power Tracker, September 2026 release. Distributed under a Creative Commons Attribution 4.0 International License.
- EIA Open Data bulk file — Electricity (ELEC.zip; monthly plant net generation and fuel consumption since 2001)Source: U.S. Energy Information Administration, Electricity bulk data (Form EIA-923 monthly plant series)
- EIA-860M Preliminary Monthly Electric Generator Inventory
- EPA Greenhouse Gas Reporting Program — facility register with parent-company shares (Envirofacts pub_dim_facility; FLIGHT)
- EIA-860 Annual Electric Generator Report — Schedule 4 Owner (ownership shares per generator), plus Plant/Generator schedules
Around this plant
Nearby
within 25 km| Project | Kind | Away | MW |
|---|---|---|---|
| Snowflake A Solar and BESS Filed | Solar + storage | 17.5 km | 950 |